BIO202L: Anatomy & Physiology II Lab Blood Vessels and the Heart Final Report Student Name Student ID Lesson Institution Session

BIO202L: Anatomy & Physiology II Lab Blood Vessels and the Heart Final Report Student Name Student ID Lesson Institution Session Course Instructor 487716 Blood Vessels and the Heart Straighterline V5 BIO202L: Anatomy & Physiology II Lab Instructor Account � � NEED HELP WITH YOUR ONLINE COURSES & ASSIGNMENTS? � � We are academic experts here to make your journey easier! We offer reliable academic support for students taking courses through platforms such as StraighterLine, Sophia Learning, Portage Learning, and more. Course & Class Support Essays & Research Papers School Assignments Discussion Posts & Written Work Academic Research & Formatting % Quality Work • Reliable Service • Student-Focused Support. � � Email: � � : +1 (786) 941 9344 Test Your Knowledge Classify each phrase as describing heart muscle, an artery, or a vein. Copyright 2026 - Science Interactive | Sequence the structures in the order that blood flows into and out of the heart, beginning with deoxygenated blood from the body. Vena cava Right atrium Right ventricle Pulmonary arteries Pulmonary veins Left atrium Left ventricle Aorta Match each term to the best description. Exploration Copyright 2026 - Science Interactive | Copyright 2026 - Science Interactive | The are the upper chambers of the heart. atria ventricles chordae tendineae vena cava Oxygenated blood returns to the left atrium of the heart through the . vena cava pulmonary arteries aorta pulmonary veins The allow the passage of ions from one cardiac muscle cell to another. sarcomeres myofibrils nuclei intercalated discs Veins that are the same size as arteries have comparatively wider lumens. True False Exercise 1 Copyright 2026 - Science Interactive | What is the function of intercalated discs? How did the intercalated discs appear in the cardiac muscle slide viewed in this exercise? Reference Photo 1 in your explanation. Intercalated discs are specialized structures that connect neighboring heart muscle cells, allowing them to function as a single, coordinated unit. They keep the cells firmly attached to one another while also enabling electrical signals to travel rapidly between them. These discs contain desmosomes, which act like strong anchors that prevent the cells from pulling apart during the powerful contractions of the heart. They also contain gap junctions, which serve as tiny channels that allow electrical impulses to pass directly from one cell to the next. This rapid communication ensures that the heart muscle contracts in a smooth and synchronized rhythm rather than as separate, uncoordinated cells. When viewed under the microscope, as shown in Photo 1, intercalated discs appear as thin, dark lines that run across the heart muscle fibers, often giving them a slightly jagged or step-like appearance. What causes striation of the cardiac muscle? Were you able to visualize the striations of the heart muscle? If your answer is no, why do you think that was the case? Cardiac muscle has a striped, or striated, appe